Re: [matplotlib-devel] more fun with animation

[Abraham S. <ab...@cn...>]

Sorry, realized I was a little vague. When I say, 'choppy', I mean that 
some cells won't get updated. If there is a lot of activity everything 
looks like, but once activity dies down, some elements stay on in 
various stages (somewhat like bad pixels).

Abraham Schneider wrote:

> Hi. Sorry if this was covered already, but I ran into a recent problem 
> with animating an image using GTKAgg (and matplotlib 0.83.2). In my 
> update_fig() function, I do:
>
> im.set_data(g)
> manager.canvas.draw()
>
> where g is some arbritrary 20x20 array. Over time it's elements will 
> be set to 1, and then decay exponentially. For the majority of the 
> time the array contains all 0s. Under these conditions, it gets very 
> choppy, and skips a large number of frames.
>
> If I do something like: g[0, 0] = 1, then the animation runs smoothly, 
> and looks like it's supposed to (except I now have one cell in the 
> grid set the an incorrect value.
>
> I haven't had time to do a full search yet, but was hoping someone 
> might at least have an idea of where to begin to look. My current 
> suspicions is that there might be a caching issue.
>
> Thanks,
>
> Abe
>
>
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